JPH0431590Y2 - - Google Patents
Info
- Publication number
- JPH0431590Y2 JPH0431590Y2 JP1989052238U JP5223889U JPH0431590Y2 JP H0431590 Y2 JPH0431590 Y2 JP H0431590Y2 JP 1989052238 U JP1989052238 U JP 1989052238U JP 5223889 U JP5223889 U JP 5223889U JP H0431590 Y2 JPH0431590 Y2 JP H0431590Y2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- shift register
- drive
- thermal head
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 10
- 239000000523 sample Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical group C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Electronic Switches (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Description
【考案の詳細な説明】
この考案は、複数の発熱抵抗体を有するサーマ
ルヘツドを簡単に試験する試験装置に関する。[Detailed Description of the Invention] This invention relates to a test device for easily testing a thermal head having a plurality of heating resistors.
従来、サーマルヘツドの試験は、発熱抵抗体の
形成後、発熱抵抗体への通電用電極の導体露出部
にプローブを当てて抵抗値を測定するか、または
実際にサーマルヘツドで感熱紙に印字記録するこ
とによつて行なわれていた。 Conventionally, thermal head testing involves forming a heating resistor and then measuring the resistance value by applying a probe to the exposed conductor of the electrode for energizing the heating resistor, or by actually printing and recording it on thermal paper using the thermal head. It was done by doing.
しかし、前者の方法ではプローブを種々の位置
に設定するためにXYテーブル等の複数なメカニ
ズムを要し、手間がかかるばかりでなく、プロー
ブによつて薄く微細な電極を破損することがしば
しばある。一方、後者の方法は簡便ではあるが、
回路部分に不良がある場合、発熱抵抗体が連続的
に通電されて焼損する危険性があつた。 However, the former method requires multiple mechanisms such as an XY table to set the probe at various positions, which is not only time-consuming, but also often causes damage to thin and fine electrodes by the probe. On the other hand, although the latter method is simple,
If there was a defect in the circuit, there was a risk that the heating resistor would be continuously energized and burnt out.
この考案は上記従来方法の欠点に鑑みてなされ
たもので、電極にプローブを当てることなく、ま
た実際に記録を行なうことなく、簡便にサーマル
ヘツドの発熱抵抗体および回路部分の試験を行な
うことができるサーマルヘツドの試験装置を提供
することを目的としている。この考案は、各一端
が第１の電源供給端子に共通接続された複数の発
熱抵抗体と、これらの発熱抵抗体の各他端と第２
の電源供給端子との間にそれぞれ接続され、記録
信号に応じてこれらの発熱抵抗体を個別に駆動す
る複数の駆動素子と、直列に入力される記録信号
を前記複数の駆動素子に並列に供給するシフトレ
ジスタとを備えたサーマルヘツドの試験装置であ
つて、前記第１、第２の電源供給端子間に電源を
接続した状態で、前記シフトレジスタの記録信号
入力端子にパルスを与えると共にクロツクパルス
入力端子にクロツクパルスを１個ずつ供給するこ
とにより、前記駆動素子を１個ずつ順次オンにす
る制御手段と、この制御手段より前記駆動素子が
１個ずつ順次オンにされるに伴い、前記第１、第
２の電源供給端子間に流れる電流を測定して、前
記発熱抵抗体の抵抗値の測定と前記駆動素子及び
シフトレジスタの動作チエツクを行う手段とを具
備することを特徴とする。 This idea was made in view of the drawbacks of the conventional methods mentioned above, and it is possible to easily test the heating resistor and circuit part of a thermal head without applying a probe to the electrodes or actually recording. The purpose is to provide a thermal head testing device that can perform This invention consists of a plurality of heating resistors each having one end commonly connected to a first power supply terminal, and a second
a plurality of drive elements each connected to a power supply terminal of the drive element and individually drive these heating resistors according to a recording signal; and a recording signal inputted in series is supplied in parallel to the plurality of drive elements. The thermal head testing device is equipped with a shift register that outputs a clock pulse while applying a pulse to a recording signal input terminal of the shift register while a power supply is connected between the first and second power supply terminals. a control means for sequentially turning on the drive elements one by one by supplying clock pulses to terminals one by one; and as the control means sequentially turns on the drive elements one by one, the first The present invention is characterized by comprising means for measuring the current flowing between the second power supply terminals to measure the resistance value of the heating resistor and check the operation of the drive element and the shift register.
以下、この考案を実施例により詳細に説明す
る。 Hereinafter, this invention will be explained in detail with reference to examples.
図はこの考案の一実施例を説明するためのもの
で、まずサーマルヘツド１は次のように構成され
ている。２1〜２oは一列に配列された複数の発熱
抵抗体であり、その各一端は第１の電源供給端子
３ａに共通接続され、各他端はトランジスタ等の
スイツチング素子を主体とする駆動素子４1〜４o
をそれぞれ介して第２の電源端子３ｂに接続され
ている。駆動素子４1〜４oはシフトレジスタ５か
ら並列に供給される記録信号に応じて発熱抵抗体
２1〜２oを個別に駆動する。すなわち記録信号、
例えばフアクシミリ画信号は、記録信号入力端子
６より直列に入り、クロツクパルス入力端子７か
ら入力されるクロツクパルスによつてシフトレジ
スタ５に蓄積される。そして、シフトレジスタ５
に１ライン分の記録信号が蓄積された時点で、シ
フトレジスタ５の内容が並列に読出されることに
より、駆動素子４1〜４oが記録信号に応じて選択
的に動作し、それに伴い発熱抵抗体２1〜２oが電
源供給端子３ａ，３ｂを通して通電され、発熱す
る。その結果、発熱抵抗体２1〜２oに対向して走
行する感熱紙に発色記録が行なわれる。 The figure is for explaining one embodiment of this invention. First, a thermal head 1 is constructed as follows. 2 1 to 2 o are a plurality of heat generating resistors arranged in a row, each one end of which is commonly connected to the first power supply terminal 3a, and each other end connected to a drive element mainly consisting of a switching element such as a transistor. 4 1 ~ 4 o
are respectively connected to the second power supply terminal 3b. The driving elements 4 1 to 4 o individually drive the heating resistors 2 1 to 2 o in accordance with recording signals supplied in parallel from the shift register 5 . That is, the recording signal,
For example, a facsimile image signal is serially inputted from the recording signal input terminal 6 and stored in the shift register 5 by a clock pulse inputted from the clock pulse input terminal 7. And shift register 5
When the recording signal for one line is accumulated, the contents of the shift register 5 are read out in parallel, so that the driving elements 41 to 4o selectively operate according to the recording signal, and heat generation occurs accordingly. The resistors 2 1 to 2 o are energized through the power supply terminals 3a and 3b and generate heat. As a result, color recording is performed on the thermal paper running opposite the heating resistors 2 1 to 2 o .
このように構成されたサーマルヘツド１を試験
する場合は、第１、第２の電源供給端子３ａ，３
ｂ間に電源８と電流計９を直列に接続する。この
状態でシフトレジスタ５の内容をオール“０”に
リセツトすると、駆動素子４1〜４oは全てオフと
なるから、電流計９の指示値は０（Ａ）を示す。 When testing the thermal head 1 configured in this way, the first and second power supply terminals 3a, 3
A power supply 8 and an ammeter 9 are connected in series between b. When the contents of the shift register 5 are reset to all "0" in this state, all of the driving elements 4 1 to 4 o are turned off, so that the indicated value of the ammeter 9 indicates 0 (A).
次に、記録信号入力端子６に「黒」信号に相当
する“１”レベルのパルスを１個与えると同時
に、クロツクパルス入力端子７にクロツクパルス
を１個だけ与えた後、シフトレジスタ５の内容は
並列に読出す。これにより駆動素子４1〜４oは４
１のみがオンとなるので、発熱抵抗体２1〜２oの
うち２1のみに通電が行なわれる。このとき、発
熱抵抗体２1の抵抗値をR1、電源８の電圧をＶと
すれば、第１、第２の電源供給端子３ａ，３ｂ間
の電流Ｉ、すなわち電流計９の指示値はＶ／R1
となる。従つて、この指示値が規定値か否かを判
定することにより、発熱抵抗体２1の抵抗値R1お
よび駆動素子４1の動作状態をチエツクすること
ができる。 Next, one pulse of "1" level corresponding to a "black" signal is applied to the recording signal input terminal 6, and at the same time only one clock pulse is applied to the clock pulse input terminal 7, and the contents of the shift register 5 are transferred in parallel. read out. As a result, the drive elements 4 1 to 4 o are 4
Since only one of the heating resistors 2 1 to 2 o is turned on, only 2 1 of the heating resistors 2 1 to 2 o is energized. At this time, if the resistance value of the heating resistor 2 1 is R 1 and the voltage of the power source 8 is V, then the current I between the first and second power supply terminals 3 a and 3 b, that is, the indicated value of the ammeter 9 is V/R 1
becomes. Therefore, by determining whether this instruction value is a specified value or not, it is possible to check the resistance value R 1 of the heating resistor 2 1 and the operating state of the drive element 4 1 .
次に、クロツクパルス入力端子７にクロツクパ
ルスをさらに１個与えた後、シフトレジスタ５の
内容を読出すと、駆動素子４2のみがオンとなつ
て発熱抵抗体２2のみに通電が行なわれる。この
場合も、同様に電流計９の指示値から、発熱抵抗
体２2の抵抗値、駆動素子４2の動作状態をチエツ
クすることができる。 Next, after one more clock pulse is applied to the clock pulse input terminal 7, when the contents of the shift register 5 are read out, only the driving element 42 is turned on and only the heating resistor 22 is energized. In this case as well, the resistance value of the heating resistor 2 2 and the operating state of the drive element 4 2 can be checked from the indicated value of the ammeter 9.
以下、同様にクロツクパルス入力端子７に順次
クロツクパルスを１個ずつ与え、かつシフトレジ
スタ５の内容をその都度読出して駆動素子４1〜
４oを１個ずつオン状態にし、そのときの電流計
９の指示値を判定することによつて、発熱抵抗体
２1〜２oの抵抗値、駆動素子４1〜４oの動作状
態、さらにシフトレジスタ５の機能等をすべて試
験できることになる。 Thereafter, similarly, clock pulses are sequentially applied to the clock pulse input terminal 7 one by one, and the contents of the shift register 5 are read out each time to drive the driving elements 4 1 to 4.
By turning on 4 o one by one and determining the indicated value of the ammeter 9 at that time, the resistance values of the heating resistors 2 1 to 2 o , the operating states of the drive elements 4 1 to 4 o , Furthermore, all the functions of the shift register 5 can be tested.
この場合、電源８の電圧Ｖは、電流計９で電流
Ｉの値を測定できる程度の記録電圧より十分小さ
な電圧で済むので、例えば駆動素子がシヨートし
ている場合等、発熱抵抗体が連続的に通電されて
も、発熱抵抗体が焼損するおそれはない。 In this case, the voltage V of the power source 8 needs to be sufficiently smaller than the recording voltage that allows the ammeter 9 to measure the value of the current I. There is no risk of burning out the heating resistor even if the current is applied.
以上説明したように、この考案によればサーマ
ルヘツド上の電極に一切プローブを当てることな
く、しかもサーマルヘツドに実際に記録動作を行
なわせることなく、記録電圧より十分低い電圧を
用いて、サーマルヘツドの試験を発熱抵抗体の抵
抗値のみならず駆動素子やシフトレジスタ等の回
路部分の動作チエツクを含めて、簡便に試験する
ことができる。 As explained above, according to this invention, the thermal head can be recorded using a voltage sufficiently lower than the recording voltage without applying any probes to the electrodes on the thermal head and without actually causing the thermal head to perform recording operation. It is possible to easily test not only the resistance value of the heating resistor but also the operation check of circuit parts such as drive elements and shift registers.
また、特にこの考案では発熱抵抗体の抵抗値測
定に際して、サーマルヘツドに元々備わつている
要素（駆動素子及びシフトレジスタ）を用いて個
個の発熱抵抗体を選択するため、電源及び電流計
を除いて測定のために特別な装置を用意する必要
がなく、測定が極めて簡便である。 In particular, in this invention, when measuring the resistance value of the heating resistor, the elements (driving element and shift register) originally included in the thermal head are used to select the individual heating resistor, so a power supply and an ammeter are required. Except for this, there is no need to prepare any special equipment for measurement, and measurement is extremely simple.
図はこの考案の一実施例を説明するための結線
図である。
１……サーマルヘツド、２1〜２o……発熱抵抗
体、３ａ，３ｂ……第１、第２の電源供給端子、
４1〜４o……駆動素子、５……シフトレジスタ、
６……記録信号入力端子、７……クロツクパルス
入力端子、８……電源、９……電流計。
The figure is a wiring diagram for explaining one embodiment of this invention. DESCRIPTION OF SYMBOLS 1...Thermal head, 21-2o ...Heating resistor, 3a, 3b...First and second power supply terminals ,
4 1 to 4 o ...drive element, 5...shift register,
6...Record signal input terminal, 7...Clock pulse input terminal, 8...Power supply, 9...Ammeter.
Claims (1)
複数の発熱抵抗体と、これらの発熱抵抗体の各他
端と第２の電源供給端子との間にそれぞれ接続さ
れ、記録信号に応じてこれらの発熱抵抗体を個別
に駆動する複数の駆動素子と、直列に入力される
記録信号を前記複数の駆動素子に並列に供給する
シフトレジスタとを備えたサーマルヘツドの試験
装置であつて、 前記第１、第２の電源供給端子間に電源を接続
した状態で、前記シフトレジスタの記録信号入力
端子にパルスを与えると共に該シフトレジスタの
クロツクパルス入力端子にクロツクパルスを１個
ずつ供給することにより、前記駆動素子を１個ず
つ順次オンにする制御手段と、 この制御手段より前記駆動素子が１個ずつ順次
オンにされるに伴い、前記第１、第２の電源供給
端子間に流れる電流を測定して、前記発熱抵抗体
の抵抗値の測定と前記駆動素子及びシフトレジス
タの動作チエツクを行う手段と を具備することを特徴とするサーマルヘツドの試
験装置。[Claims for Utility Model Registration] A plurality of heat generating resistors each having one end commonly connected to a first power supply terminal, and a plurality of heat generating resistors each having one end connected to a first power supply terminal, and a plurality of heat generating resistors each having one end connected to a second power supply terminal, respectively. A thermal head comprising a plurality of drive elements connected to each other to individually drive these heating resistors according to a recording signal, and a shift register that supplies serially input recording signals to the plurality of drive elements in parallel. In the testing apparatus, with a power supply connected between the first and second power supply terminals, a pulse is applied to the recording signal input terminal of the shift register, and a clock pulse is applied to the clock pulse input terminal of the shift register. a control means for sequentially turning on the driving elements one by one by supplying the driving elements one by one; and as the driving elements are turned on one by one by the control means, the first and second power supply 1. A thermal head testing device comprising means for measuring the resistance value of the heating resistor and checking the operation of the drive element and shift register by measuring the current flowing between the terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989052238U JPH0431590Y2 (en) | 1989-05-02 | 1989-05-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989052238U JPH0431590Y2 (en) | 1989-05-02 | 1989-05-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0263476U JPH0263476U (en) | 1990-05-11 |
| JPH0431590Y2 true JPH0431590Y2 (en) | 1992-07-29 |
Family
ID=31278243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989052238U Expired JPH0431590Y2 (en) | 1989-05-02 | 1989-05-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0431590Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5319423A (en) * | 1976-07-30 | 1978-02-22 | Toyobo Co Ltd | Production of hollow fiber membranes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5458654U (en) * | 1977-09-30 | 1979-04-23 |
-
1989
- 1989-05-02 JP JP1989052238U patent/JPH0431590Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5319423A (en) * | 1976-07-30 | 1978-02-22 | Toyobo Co Ltd | Production of hollow fiber membranes |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0263476U (en) | 1990-05-11 |
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